Doug Lemov’s first book sold 800,000 copies, a teaching phenomenon. His new book has even more.

A teacher could also be “cold calling,” which means asking questions of students who don’t raise their hands and are less likely to have paid attention. “Be aware, though,” Lemov says, “that it’s important not to limit your cold call only to when you check for understanding. You want to cold call before — and frequently — so that you normalize it, and students aren’t surprised when you use cold call as part of your targeted questions.”

NASHVILLE -- A bill requiring Tennessee's State Board of Education to drop Common Core education standards and develop new requirements has a math problem: It's projected to cost $4.14 million over a three-year period.